The client is demonstrating signs and symptoms of digoxin toxicity. The antidote for cardiac digitalis glycoside toxicity is:
Naloxone (Narcan)
digoxin immune FAB (Digibind)
Vitamin K
inamrinone (Inocor)
The Correct Answer is B
A) Naloxone (Narcan):
Naloxone is the antidote for opioid overdose, not for digoxin toxicity. It works by reversing the effects of opioid drugs such as morphine, heroin, and oxycodone by binding to opioid receptors in the brain. While Naloxone is vital in opioid toxicity, it has no effect on the toxicity of digoxin.
B) Digoxin immune FAB (Digibind):
Digoxin immune FAB (Digibind) is the antidote for digoxin toxicity. It works by binding to the digoxin molecules in the bloodstream, thereby inactivating them and preventing them from exerting their toxic effects on the heart. This treatment is critical in cases of severe digoxin toxicity, particularly when the patient exhibits symptoms such as life-threatening arrhythmias, severe bradycardia, or altered mental status.
C) Vitamin K:
Vitamin K is the antidote for warfarin (Coumadin) toxicity, not digoxin toxicity. It promotes the synthesis of clotting factors in the liver and is used to reverse excessive anticoagulation in cases of bleeding due to warfarin. It has no effect on digoxin toxicity, which requires specific treatment with digoxin immune FAB.
D) Inamrinone (Inocor):
Inamrinone is an inotropic medication used to treat severe heart failure by improving heart contractility. However, it is not used as an antidote for digoxin toxicity. In fact, inamrinone and other inotropic agents may be used cautiously in patients with digoxin toxicity, as they could potentially exacerbate arrhythmias, a known complication of digoxin toxicity.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A) Headache:
Headache is a known side effect of angiotensin receptor blockers (ARBs), such as losartan, valsartan, and olmesartan. These medications can cause headaches due to their vasodilatory effects, which can lead to changes in blood pressure and blood flow. While not everyone will experience this side effect, it is considered relatively common.
B) Dizziness:
Dizziness is another common side effect of ARBs. As ARBs cause vasodilation by blocking the angiotensin II receptors, they can lower blood pressure, leading to dizziness or lightheadedness, especially when standing up quickly. This is particularly noticeable in patients who are elderly or who are on multiple antihypertensive medications.
C) Constipation:
Constipation is not a typical side effect of angiotensin receptor blockers (ARBs). While some medications, especially calcium channel blockers and certain opioid analgesics, are more commonly associated with constipation, ARBs do not have this effect. ARBs primarily affect the vascular system and the kidneys, and constipation is not generally a side effect.
D) Hypotension:
Hypotension (low blood pressure) is a common side effect of ARBs. Since these medications relax blood vessels and decrease blood pressure by blocking the effects of angiotensin II, they can lead to a drop in blood pressure, particularly in the first few days of treatment or when starting therapy. This can result in symptoms like dizziness or fainting, especially when changing positions (postural hypotension).
Correct Answer is B
Explanation
Given:
Ordered dose of Vancomycin: 500 mg
Infusion rate: 5 mg/kg/hr
Patient weight: 98 lbs
Concentration of Vancomycin: 500 mg/100 mL
Step 1: Convert patient weight from pounds to kilograms:
1 pound (lb) = 0.453592 kilograms (kg)
Patient weight in kg = 98 lbs x 0.453592 kg/lb = 44.462256 kg
Step 2: Calculate the total dose of Vancomycin in mg/hr:
Total dose (mg/hr) = Ordered dose (mg/kg/hr) x Patient weight (kg)
Total dose (mg/hr) = 5 mg/kg/hr x 44.462256 kg
Total dose (mg/hr) = 222.31128 mg/hr
Step 3: Calculate the infusion rate in mL/hr:
Infusion rate (mL/hr) = Total dose (mg/hr) / Concentration (mg/mL)
Infusion rate (mL/hr) = 222.31128 mg/hr / (500 mg/100 mL)
Infusion rate (mL/hr) = 222.31128 mg/hr x (100 mL/500 mg)
Infusion rate (mL/hr) = 44.462256 mL/hr
Step 4: Round to the nearest tenth:
Infusion rate (mL/hr) ≈ 44.5 mL/hr
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